Lin Cangcang transmigrates to an unfamiliar ancient world and becomes Qingxi, a servant girl to the spoiled young master of the Pingyuan Marquis Household. To make matters worse, she'd been selected from childhood to be his bedmate!
Lin Cangcang turns and runs, unwilling to stay a second longer.
On the way out, she runs into Bai Jun, a Saintess from the Southern Border, who wants to use her to test a gu!
“Big Sister, look how well-behaved I am. Could you please not use gu on me?”
Bai Jun smiles warmly. “No.”
(Dual heroines. This story is set in a fictional world, and everything about the gu clans is invented. Please don't read too much into it.)